Archibald stewart



nitnh faire atznt @ffice ARCHIBALD STEWART, OF rTROY, WISCONSIN.

Letters Patent No. 65,297, dated May 28, 186i'.

IMPROVEMENT IN DRAUGHT-BQUALIZEB. FOR HORSE-POWERS.

TO ALL W HOM IT MAY CONCERN:

Be it known that I, ARCHIBALD STEWARD, of Troy, in the county of Vil'alworth,` and Stateof Wisconsin, have invented a new and useful Improvement in Draught-Equalizer for Horse-Powers; andI do hereby decl-are that the following is a full, clear, and exact description thereof, which will enable others skilled in the art `to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a vertical longitudinal section of my improved equalizer taken through the line g/ y, fig. 2. v

Figure 2 is a horizontal section of the same taken through the line a: z, iig. 1.

' Similar letters of reference indicate like parts.

My invention has for its object to prevent breakage in the machinery of threshing and other machines driven by horse-power, from the strain caused by the sudden starting` or jerking of the horses, and it consists in the combinationof the tumbling-rod, outer cylinder, coiled spring, inner cylinder or` roller, and rd, with each other, as hereinafter more fully described.

A represents the tumbling-rod, which is attached securely to the end of. the cast-iron cylinder B. The cylinder B is hollow,and has a roller, C, placed in its centre, the ends of which revolve in bearings in the ends of the cylinder B: The roller or interior cylinder C is perforated longitudinally with asquare hole, for the rcception of thexsquared end of the rod B, by which the motion is transferred from the horse-power to the machinery to be driven. E is a spring coiled around the roller or cylinder C, towhich one of its ends is attached, the other end being securely attached to the side of the outer cylinder B, as shown in figs. 1 and 2. The spring E must be of a size, strength, and elasticity proportioned to the power vto be applied, so that the greatest power that will be applied to it shall never be able to coil the spring up closely around the roller C, but the power will always he transferred to the machinery through the mediuinot` the elasticity of the said spring.

By this construction any strain caused by the sudden starting up or jerking of the horses will be neutralized, and all breakages of the machinery from this cause will be eiectually guarded against.

I claim as new, and desire to secure by Letters Patent- The combination of thc tumbling-rod A, outer cylinder B, coiledv spring E, interior cylinder or roller C, and rod D, with each other, substantially as herein shown and described and for the purpose set forth.

ARCHIBALD STEVVAR'I.

Witnesses:

A. J. CnnNur, O. F. BRIGHT. 

